Novel fuse for direct current transmission

Abstract

The utility model relates to the technical field of fuses, and discloses a novel fuse for direct current transmission, which comprises a protective shell, a plurality of connecting terminals are fixedly mounted at the bottom in the protective shell, sockets are further fixedly mounted in the protective shell above the connecting terminals, and two end parts of each connecting terminal are respectively inserted into the corresponding sockets in a penetrating manner. A base is movably installed in the protective shell above the socket, and two U-shaped insertion pieces are fixedly installed at the lower end of the base. The two vertical parts of the U-shaped insertion piece are respectively provided with a limiting mechanism, and each limiting mechanism is composed of a mounting frame, a top block, a stress block, a movable cover and the like, and is matched with a wedge block arranged on the inner side of the protection shell, so that when the base drives the U-shaped insertion piece, the clamping piece, the limiting mechanisms and the fuse tube to be inserted into the protection shell, the U-shaped insertion piece, the clamping piece, the limiting mechanisms and the fuse tube can be inserted into the protection shell. And the mounting frame moves in the mounting through groove through limiting extrusion of the wedge block on the movable cover, so that the top block on one side of the mounting frame abuts against one side of the corresponding clamping piece.

Description

Technical Field

[0001] The utility model relates to the technical field of fuses, in particular to a novel fuse for direct current transmission. Background Art

[0002] A DC fuse is an electronic component used to protect DC circuits and devices from overcurrent damage. It plays a role similar to a fuse in a DC circuit. When an excessive current appears in the circuit, the DC fuse will automatically disconnect the circuit to prevent the current from exceeding the set range, thereby protecting the safe operation of the circuit and equipment.

[0003] The fuse tube inside the DC fuse is usually stably clamped by two sturdy clamping pieces and installed in the protective shell of the fuse. The two clamping pieces not only ensure the firm installation of the fuse tube, but also ensure the reliability of its electrical connection. One end of the fuse tube is connected to a connection terminal of the circuit through a metal connecting piece, and the other end is connected to another connection terminal, thereby realizing the connection of the circuit. The clamping pieces are mostly made of bent copper sheets. Therefore, due to wear and corrosion in long-term use, or due to external factors such as temperature fluctuations and vibrations, the fuse tube is easily loosened. During the long-term use of the fuse, if the fuse tube is frequently replaced, the clamping piece is affected by alternating stress, the internal microstructure of the metal changes, micro cracks are generated and gradually expand, and eventually the clamping piece is deformed, thereby reducing the clamping force and making the fuse tube easy to fall off. Utility Model Content

[0004] The purpose of the utility model is to provide a novel fuse for direct current transmission, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A novel fuse for direct current transmission comprises a protective shell, a plurality of connection terminals are fixedly mounted on the bottom of the protective shell, a socket is also fixedly mounted in the protective shell above the connection terminals, and two ends of the connection terminals are respectively inserted into the corresponding sockets, a base is also movably mounted in the protective shell above the socket, two U-shaped plugs are fixedly mounted on the lower end of the base, clips are respectively fixedly mounted on the lower ends of the two U-shaped plugs, a fuse tube is clamped between the two clips, two vertical portions of the U-shaped plugs are provided with mounting grooves, a limiting mechanism is movably mounted in the mounting groove, the limiting mechanism comprises a mounting frame, a top block is fixedly mounted on one side of the mounting frame, a force-bearing block is fixedly mounted on the other side of the top block, a movable cover is movably mounted on one side of the force-bearing block, and the top block is movably mounted in the mounting groove.

[0007] As a further preferred solution of the utility model, both sides of the protective shell are provided with card slots, and two wedge blocks are fixedly installed on both sides of the protective shell;

[0008] Based on this, by setting up the protective shell, the connection terminals, the socket and the fuse tube can be protected. At the same time, multiple wedge blocks are set in the protective shell to provide conditions for the displacement action of the limiting mechanism.

[0009] As a further preferred embodiment of the present invention, the base is fixedly mounted with a first card block on both sides thereof, and two second card blocks are fixedly mounted on the other two sides of the base, and a top cover is also mounted on the base through the second card blocks, the lower end of the base is inserted into the protective shell, and the first card block is mounted in the corresponding card slot, and the two ends of the U-shaped plug are respectively inserted into the corresponding sockets.

[0010] As a further preferred solution of the utility model, a plurality of screw grooves are provided on one side of the force-bearing block.

[0011] As a further preferred embodiment of the present invention, a plurality of countersunk holes are provided on one side of the movable cover, connecting screws are inserted into the countersunk holes, one side of the movable cover is inserted into one side of the force-bearing block, and one side of the connecting screw is threadedly connected in the corresponding screw groove, and a compression spring is also sleeved on the outer side of the connecting screw, one side of the compression spring abuts against one side of the force-bearing block, and the other side of the compression spring abuts against one side of the movable cover;

[0012] Based on this, a force block is set on one side of the installation frame, and a movable cover supported by multiple compression springs is set on one side of the force block. After the movable cover is limited and squeezed by the wedge block, the installation frame can be driven to move to one side, so that the installation frame drives one side of the top block to contact the corresponding side of the clip, thereby preventing the fuse tube from falling off due to the inability to clamp the fuse tube due to metal fatigue of the clip.

[0013] As a further preferred solution of the utility model, bending pieces are fixedly installed on both sides of the installation frame, and the installation frame is inserted and installed in the installation groove, and the bending piece is placed on one side of the vertical part of the U-shaped insert.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] In the utility model, a limiting mechanism is respectively arranged at the two vertical parts of the U-shaped plug, and the limiting mechanism is composed of a mounting frame, a top block, a force-bearing block, a movable cover and other structures, and cooperates with a wedge block arranged on the inner side of the protective shell. When the base drives the U-shaped plug, the clamping piece, the limiting mechanism and the fuse tube to be inserted into the protective shell, the mounting frame is moved in the mounting groove through the limiting squeezing of the movable cover by the wedge block, so that the top block on one side of the mounting frame abuts against the corresponding side of the clamping piece, thereby preventing the clamping piece from having insufficient clamping force and causing the fuse tube to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 This is a cross-sectional view of the protective shell of the utility model;

[0018] Figure 3 This is a schematic diagram of the U-shaped insert and clip structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the split structure of the U-shaped insert and the limiting mechanism of the utility model;

[0020] Figure 5 It is a cross-sectional view of the limiting mechanism of the utility model.

[0021] In the figure: 1. protective shell; 2. connecting terminal; 3. socket; 4. base; 5. U-shaped plug; 6. clip; 7. mounting slot; 8. limit mechanism; 9. mounting frame; 10. top block; 11. force block; 12. movable cover; 13. top cover; 14. slot; 15. wedge block; 16. first clamping block; 17. second clamping block; 18. fuse tube; 19. bending piece; 20. screw groove; 21. countersunk hole; 22. connecting screw; 23. compression spring. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figure 1-Figure 5As shown, the utility model provides a novel fuse for direct current transmission, comprising a protective shell 1, a plurality of connecting terminals 2 are fixedly installed at the bottom of the protective shell 1, a socket 3 is also fixedly installed in the protective shell 1 above the connecting terminals 2, and two ends of the connecting terminals 2 are respectively inserted into the corresponding sockets 3, a base 4 is also movably installed in the protective shell 1 above the socket 3, two U-shaped plugs 5 are fixedly installed at the lower end of the base 4, clips 6 are respectively fixedly installed at the lower ends of the two U-shaped plugs 5, a fuse tube 18 is clamped between the two clips 6, two vertical portions of the U-shaped plugs 5 are provided with mounting grooves 7, a limiting mechanism 8 is movably installed in the mounting grooves 7, the limiting mechanism 8 comprises a mounting frame 9, a top block 10 is fixedly installed on one side of the mounting frame 9, a force-bearing block 11 is fixedly installed on the other side of the top block 10, a movable cover 12 is movably installed on one side of the force-bearing block 11, and the top block 10 is movably installed in the mounting groove 7.

[0024] like Figure 1-Figure 2 As shown, both sides of the protective shell 1 are provided with card slots 14, and two wedge blocks 15 are fixedly installed on both sides of the protective shell 1. Through the setting of the protective shell 1, the connecting terminal 2, the socket 3 and the fuse tube 18 can be protected. At the same time, multiple wedge blocks 15 are arranged in the protective shell 1, which can provide conditions for the displacement action of the limiting mechanism 8. The base 4 has first card blocks 16 fixedly installed on both sides, and two second card blocks 17 fixedly installed on the other two sides of the base 4. The top cover 13 is also clamped on the base 4 through the second card block 17. The lower end of the base 4 is inserted into the protective shell 1, and the first card block 16 is clamped in the corresponding card slot 14. The two ends of the U-shaped plug 5 are respectively inserted in the corresponding socket 3.

[0025] like Figure 2-Figure 5 As shown, a plurality of screw grooves 20 are provided on one side of the force-bearing block 11, a plurality of countersunk holes 21 are provided on one side of the movable cover 12, connecting screws 22 are inserted and installed in the countersunk holes 21, one side of the movable cover 12 is inserted and installed in one side of the force-bearing block 11, and one side of the connecting screw 22 is threadedly connected in the corresponding screw groove 20, and a compression spring 23 is also sleeved on the outer side of the connecting screw 22, one side of the compression spring 23 abuts against one side of the force-bearing block 11, and the other side of the compression spring 23 abuts against one side of the movable cover 12, the force-bearing block 11 is arranged on one side of the installation frame 9, and A movable cover 12 supported by a plurality of compression springs 23 is provided on one side of the force-bearing block 11. After the movable cover 12 is limited and squeezed by the wedge block 15, the mounting frame 9 can be driven to move to one side, so that the mounting frame 9 drives one side of the top block 10 to contact the corresponding side of the clamping piece 6, thereby preventing the fuse tube 18 from falling off due to the inability to clamp the fuse tube 18 due to metal fatigue of the clamping piece 6. Bending pieces 19 are fixedly installed on both sides of the mounting frame 9, and the mounting frame 9 is inserted and installed in the mounting groove 7, and the bending piece 19 is placed on one side of the vertical part of the U-shaped plug 5.

[0026] It should be noted that the utility model is a novel fuse for direct current transmission. When installing the fuse tube 18, the two ends of the fuse tube 18 can be respectively clamped in the corresponding clips 6, so that the fuse tube 18 can be clamped and installed by two means. Then, the U-shaped plug 5, the clip 6, and the fuse tube 18 are inserted into the protective shell 1 through the base 4, and the two ends of the U-shaped plug 5 are respectively inserted into the corresponding sockets 3, so that the fuse tube 18 can be electrically connected to the external circuit through the clip 6, the U-shaped plug 5 and the connecting terminal 2. At the same time, when the U-shaped plug 5 is gradually installed in place, the installation frame 9 in the two vertical parts of the U-shaped plug 5 moves down synchronously with the U-shaped plug 5, and the movable cover 12 on one side of the force block 11 is moved downward. After being squeezed by the corresponding inclined surface of the wedge block 15, the force-bearing block 11 is pushed to move in the direction of the clip 6, so that the force-bearing block 11 can drive the installation frame 9 to move in the installation groove 7, and the installation frame 9 drives the top block 10 to gradually contact the corresponding side of the clip 6. Due to the setting of the displacement process, after the top block 10 contacts the side of the clip 6, the movable cover 12 will be squeezed and displaced by the wedge block 15, so that the movable cover 12 moves on the side of the force-bearing block 11 and compresses the compression spring 23 toward the side of the force-bearing block 11 by a micro-process, so that the top block 10 can tightly contact the side of the clip 6, thereby preventing the clip 6 from falling off due to various factors during later use, which may cause the clamping force to decrease.

[0027] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A novel fuse for direct current transmission, characterized in that: The protective shell (1) comprises a plurality of connection terminals (2) fixedly mounted on the bottom of the protective shell (1), a socket (3) fixedly mounted in the protective shell (1) above the connection terminals (2), and two ends of the connection terminals (2) are respectively inserted into the corresponding sockets (3), a base (4) is movably mounted in the protective shell (1) above the socket (3), two U-shaped inserts (5) are fixedly mounted on the lower end of the base (4), and a clamp (6) is fixedly mounted on the lower end of each of the two U-shaped inserts (5). A fuse tube (18) is clamped between the two clips (6), and two vertical portions of the U-shaped insert (5) are provided with mounting grooves (7). A limiting mechanism (8) is movably installed in the mounting grooves (7), and the limiting mechanism (8) comprises a mounting frame (9), a top block (10) is fixedly installed on one side of the mounting frame (9), a force-bearing block (11) is fixedly installed on the other side of the top block (10), a movable cover (12) is movably installed on one side of the force-bearing block (11), and the top block (10) is movably installed in the mounting grooves (7).

2. A novel fuse for DC transmission according to claim 1, characterized in that: The protective shell (1) is provided with a card slot (14) on both sides, and two wedge blocks (15) are fixedly installed on both sides of the protective shell (1).

3. A novel fuse for DC transmission according to claim 1, characterized in that: The base (4) has first card blocks (16) fixedly mounted on both sides thereof, and two second card blocks (17) fixedly mounted on the other two sides of the base (4). The base (4) is also provided with a top cover (13) clamped on it via the second card blocks (17). The lower end of the base (4) is inserted into the protective shell (1), and the first card blocks (16) are clamped into corresponding card slots (14). The two ends of the U-shaped insert (5) are respectively inserted into corresponding sockets (3).

4. A novel fuse for DC transmission according to claim 3, characterized in that: A plurality of screw grooves (20) are formed on one side of the force bearing block (11).

5. A novel fuse for DC transmission according to claim 4, characterized in that: A plurality of countersunk holes (21) are provided on one side of the movable cover (12), and connecting screws (22) are inserted into the countersunk holes (21). One side of the movable cover (12) is inserted into one side of the force-bearing block (11), and one side of the connecting screw (22) is threadedly connected to the corresponding screw groove (20). A compression spring (23) is also sleeved on the outside of the connecting screw (22), and one side of the compression spring (23) abuts against one side of the force-bearing block (11), and the other side of the compression spring (23) abuts against the inner side of the movable cover (12).

6. A novel fuse for DC transmission according to claim 5, characterized in that: Bending pieces (19) are fixedly mounted on both sides of the mounting frame (9), and the mounting frame (9) is inserted and mounted in the mounting through slot (7), and the bending piece (19) is placed on one side of the vertical portion of the U-shaped insert (5).

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